Single and double storey extensions in Kingston upon Thames. Trusted, professional, 30+ years' hands-on experience.
Kingston upon Thames has the plots that suit good extensions, from the side returns and rear closet wings of its Victorian and Edwardian terraces to the generous gardens of larger houses near Bushy Park. GS Renovation designs and builds single and double storey extensions across KT1 to KT6, drawing on more than 30 years in the borough.

The side return is the strip of ground beside the rear closet wing on a Kingston terrace, usually wasted on a narrow passage. Filling it in widens a cramped galley kitchen into a bright kitchen-diner running the full width of the house. We dig new foundations to suit the ground, tie into the existing wall, install steel to carry the opened structure and add a glazed roof or rooflights to pull daylight deep into the plan.
Whether your extension is permitted development or needs a full planning application depends on the property. Many single storey rear and side-return builds in KT1, KT2 and KT3 fall within permitted development, but homes in a conservation area, or those already extended, usually need permission from Kingston Council. We advise on which route applies, prepare the drawings, handle the party wall notices where a boundary wall is shared and build the whole thing to building regulations.
On the larger period houses towards Surbiton and New Malden, a wrap-around extension combines the side return with a rear projection to transform the whole ground floor, while a double storey build adds a bedroom or en-suite above. These schemes almost always need planning permission from Kingston Council and careful structural design, because new steel and foundations must work with existing walls that were never built to carry the extra load. We manage the engineering from the start.
One team takes the project from foundations to final fit-out, so groundworks, steel, roofing, plastering, kitchen and decoration all follow one programme. We keep the disruption contained while you live in the house, protect the garden and access, and coordinate building control inspections at each key stage. The result ties into the original brickwork and rooflines of your Kingston home rather than looking bolted on, and it is signed off with the paperwork you will need later.
Homeowners across Kingston choose GS Renovation because we handle the extension end to end, from advising on permitted development versus planning through to the finished, decorated room. With 30+ years across KT1 to KT6, we understand how these terraces and period houses are built, size the steel correctly and deliver certified, tidy work while you stay in the home.
George was brilliant. Lovely bloke, very reasonably priced and a perfectionist to boot. He completed our small kitchen renovation with care and great attention to detail. I've already recommended him to others.
Splendid job on our new kitchen refurb, including new flooring, moving the services, installing RSJ and preparing space for new back doors… George was always friendly, communicative and has an excellent attention to detail, ensuring everything is finished to a high standard.
Giorgio is an excellent and intelligent workman, and with very reasonable prices!… He paid a lot of attention to detail that is not common at all, and the final result was immaculate. Highly recommended!
FAQ
The cost of house extensions in Kingston upon Thames depends on the size of the property, the specification and the scope of work. GS Renovation provides free, detailed and itemised quotations for every Kingston upon Thames project. Call 07472 424 226 or email info@gsrenovationltd.co.uk for a no-obligation estimate. As a rough guide, house extensions in London typically starts from roughly £40,000 for a single-storey rear extension and rises with size and specification (indicative London ranges, MyBuilder and Checkatrade, 2026). Your figure depends on the size, specification and condition of the property, which is why we survey before quoting.
We will give you an honest timescale for house extensions in Kingston upon Thames after surveying your home. Most projects run on a clear weekly programme, and we tell you up front about any lead times on materials or approvals.
GS Renovation knows Kingston upon Thames's homes and how to renovate them properly. We handle the structure, the services and the finishes, deal with building control for you, and leave you with work that is certified, guaranteed and built to last.
Many single-storey rear extensions in Kingston upon Thames fall under permitted development, but side returns, double-storey extensions and work in conservation areas usually need full planning permission. We assess your property and manage both the planning application and building control.
Yes. A large share of Kingston upon Thames's homes are Victorian and Edwardian terraced properties, and we renovate them regularly. We plan each house extensions around their particular characteristics, such as solid brick walls, rear closet wings, side returns and original period features, so the result suits the building and meets building control.
It depends on the property. Many single storey rear and side-return extensions in Kingston fall under permitted development, but if your home is in a conservation area, has been extended before, or you want a double storey build, you will usually need planning permission from Kingston Council. We assess your specific house and handle whichever route applies, along with building regulations.
Yes, Kingston upon Thames is one of our core areas. We work on every street and the KT1 area and across the wider South West London, so wherever your home is, call 07472 424 226 and we will confirm we can help.
Every Service, One Team
The same trusted team, 30+ years' hands-on experience and free, no-obligation quotes apply to every GS Renovation service in Kingston upon Thames. Explore what else we do locally:
Steel beam installation, RSJ and structural alterations.
Safe load-bearing wall removal with steel beam support.
Structural alterations, new openings and steel support.
Chimney breast removal with gallows bracket or beam support.
Open-plan kitchen, diner and living conversions.
Full refurbishments and whole-house renovations.
Bespoke kitchen design and installation.
Luxury bathroom and wet-room refurbishment.
Same Service, Nearby Areas
We carry out house extensions across Kingston upon Thames and the surrounding areas. Explore a nearby location:
Contact GS Renovation today for a free, no-obligation quote for house extensions in Kingston upon Thames.
Get Your Free Quote